Digging-machine.



W. L. SCOTT.

I DIGGING MACHINE. APPLICATION FILED NOV. 13. 1913.

Patented'Aug- 7, 1917.

2 SHEETSSHEET l.

w. L. soon.

DIGGING MACHINE.

'APPLICATION FILED NOV, I3. 1913.

1,236, 1 1 2. Patented Aug. 7, 1917.

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- Nrrnn s'rnrns PATENT OFFICE.

WILLIAM L. sco'rr, or MONTREAL, eun'nno, CANADA.

IDIGGING-MACHINE.

Application filed November 13, 1918.

To all whom it may concern: I

Be' it known that I, WILLIAM L. Soo'rr a resident of the city of Montreal, in the *Pi ovince of Quebec and Dominion of Can- 5 ada, a subject of the King of Great Britain have invented certain new and useful Improvements inflDigging-Machines; and f do hereby declare that the following is a full, clear, and exact description of the same.

My invention has for its object to provide a machine capable of digging apath for itself and then cutting in a substantially vertical plane from the face of abank.

To. this end my invention may be said briefly to consist of aportable and preferably" rotatable 'carrier frame, a bucket mounted on the frame, a motor forimparting motion to the bucket and means for so transmittingthe power from the motor to the bucket that the latter is caused to first dig a path for a short distance in advance 1 of it's carrier frame and then cut in a substantially vertical plane from the face of {a bank, the carrier frame being revolved to make successive cuts'and for the purpose of enabling the contents of the bucket to be discharged at one side.

For full comprehension, however, of my invention reference must behad to the accompanying drawings forming a part of this specification 'in' which similar reference characters indicate the same parts, and wherein:

Figure 1 is a side elevation of my improved digging machine in-operation;

Fig. 2 is a plan view thereof; Fig. 3 is a front elevation;

Fig. 4; is a horizontal sectional view taken on line A A Fig. 1 and drawn to a larger -0 scale;

Fig. 5 is a side elevation of the bucket and its carrying and operating mechanism;

Fig. 6 a face view of the bucket-bail;

Fig. 7 a vertical sectional view taken on line B B Fig. 5;

of the track illustrating particularly the means for pivotally connecting the same to the truck-frame; and

.. Fig. 11 is a front elevation of the means in Fig. 10.

In the embodiment illustrated of my invention I em pioy a truck 2, a carrier-frame Patented Aug.

Serial No. 800,776.

3, and a turn-table interposed betweenthe truck and carrier-frame, each 'of-the'se parts being in the main of a construction common to locomotive cranes and other like machines. The frame carries its rotating mechanismindicated at 5, an engine indicated at 6, operating mechanism 7, and a housing indicated at .8; the frame itself including besides other members a pair of center sills 10, a pair of posts 11, and a pair of diagonal back-stays 12.

According to my invention the forward portion of the carrying frame is of special design in order to carry and accommodate the travel of the bucket in the performance of its function in digging the path for its truck and cutting in a substantially vertical plane from the face of a bank 0:.

Provision is made forthe performance of this function by extending the center sills forwardly as at 15 and pivotally connecting to the ends thereof a vertical track braced at its upper end, from the frame by arigid back-stay 16. This back-stay has for its purpose to rigidly retain the upper end of the vertical track against displacement in both forward and rearward directions. This back-stay is a structural steel member and in order that the construction thereof may be understood I will first briefly describe the main frame.

and diagonal stay 12 before mentioned united by gusset-plates 20 and 21-bolted to opposite sides of these posts and diagonal Other braces and gusset-plates 26 stays. and 25 respectively complete these side frames of the main frame and these side,

This frame consists of a .pair of side frames made up of the posts 11- rigid stay 16 between them. This rigidstay is of substantially A-form suitably braced as at 30 to establish a rigid connection between the'upper end of the track and the,

main frame. This rigid stay is adjustably connected to the main frame by pins, 35 and a series of holes 36 in the legs of the back-stay, the forward endof which is pivotally connected as at 37 to legs 38 secured to the track.

This track consists of a of flannel;

irons 4L0 rigidly connected together .byanllbeam 41 extending substantially from end to end of the channel. I webs 42 secured to the rear sides of the chan- A pair of stiffening i The lower end of the member thus construct- BEST AVAILABLE COP ncl and united and braced by cross-channels dipper arm is indicated at 97 and 98, the 4f) afl'ord means for carrying sheaves 45. latter having a pair of'I-beams pivoted at their opposite ends to the bucket and pin 91. ed has a pair of castings 5O bolted to the This pin is preferably adjustable in a pair channels'and presenting bearings 51 in alineof angle brackets 99 secured on the top of ment and receiving a fulcrum pin '52 jourthe bucket arm.

naled in the projecting ends 15 of the center The bucket is dumped as usual by a sills thus affording a. pivotal connection bedumping rope 100 extending from the guidtween the. track and the main frame. A seing sheaves 78 to a point within easy reach ries of sheaves are mounted within this track of the operator.

one 53 near the bottom thereof and three The bucket is suspended on a twin rope near the top. These sheaves 45, 53 and 10:? extending from the bail 96 up to and carry the ropes by which the dipper and its over two of the sheaves 55 thence down the carriage are operated. The forward faces rear side of the track and under two of the of the channels 40 reinforced by wearing sheaves 45 and thence to the forward drum strips constitute rails upon which the dip= -1()3-of--thawinch mounted on the carrierper carriage runs. frame. a second drum 104 of this winch hav- This dipper carriage comprisesnn oblong ing a dipper carriage rope 74 wound around. truck-frame consisting of a pairof channels Following this dipper carriage rope from joined together by a plate (31 a pair of the upp'er,cnd of the carriage it extends from forwardly extending plates 62 being riveted cn l72 over the third sheave 55 under the to the outside webs of the channels. The third sheave 45 to the top of the drum 104 truck wheels 63 are mounted outside of the and after being wound several times around plates 62 and are rotatably carried on axles this drum it extends over the fourth sheave (it the ends of which project through the 45 down the rear side of \the track under channels 60.. The ends of these axles are sheave 53 and up the front pf the track and reduced and threaded and carry a pair of terminates in the end 73. The drums of the s de'plates (35 which are rigidly connected winch are independently operated by drivthcreto by 'nuts 66, the plates being-rigidly ing frictions 110 and controlled by friction connected together by a tie-bar 67. The rear brakes of any preferred type notillus rated edges of these plates are bent inwardly'beandacting upon cylindrical face 112; the hindthe flanges of the channels as at to driving mechanism being operated by the retain the truck movably upon the track, engine through the medium of a crank-shaft angles "1 stitfeningthese plates. The ends 115 operating a spur gear 116 intermeshing 72-and 73 of an operating rope 74 are conwith spur gears which in turn operate the nected to this truck, the end 72 being condrums by means of friction clutches, the connected to a turn buckle 75 directly to the upnection between the engine and the crankper axle (i4 and the end 73 being taken outshaft being of any desired form not shown. side of the lower axle'and connected by a forked strap clevis 200 straddling the connecte'l end 72 of the rope, this arrangement The operation of my improved digging of th rope end 7 3 serving. when this end is machine is as follows in tension, to crowd the lower end of the The machine preferably rests on rails laid truck on to the track. A pair of sheaves78 in thedircction of the bank to be cut. The mounted on the outside of one of the side operator lowers the dipper carriage to the Operation.

plates serve to guidethe rope for dumping bottom of the track and just before the can thedipper as will be presently shown. riage reaches this position he permits the The dipper S0 is carried at the outer end dipper to swing beneath the projecting ends of an arm 81 pivoted bctween'the plates 62 15 of the center sills thus causing it as the can fulcrum pin 82 upon which a strut is carriagereaches its lowermost position to also carried. This strut consists of a pair of bite into the ground beneath these projectchannel iron legs p voted at their lower ing sills. He then holds the carriage in this ends on the pin 82 and having a cross chan-.. position by applying the brake to its operatnelSG rigidly secured at their outer ends and ing. drum and raises the bucket and its arm shod with a. piece of timber 87 serving as a until they assume horizontal position: In bearing for the rope as will be presently order to cause the pull on 'the rope to be shown; a. tie-bar 88 having the upper end of effective in performing this operation the a rigid brace 89 secured thereto at the lower strut 87 following thc dijpper to its lmverend thereof having an eye 90 through which most position will have deflected the rope projects a pin 91 serving also as a portion of .to the. forward position indicated by dotted the mean for eonnectingthe dipper to the. lines in Fig. 1. It may be explained here dipper arm. that when the dipper is permitted to swing 'lhe dipper is of well-known construction beneath the projecting sill ends it is made having a bottom dumping door 95 and bail to assume a position with the edge of its 96. The connection of the dipper to the lip slightly behind the vertical lil. i ii the pivot ofits arm in the dippercarriage, the effect being that the cut made directly in advance of the machine carriage is substantially horizontal. Immediately the dipper and its arm assumes this horizontal position the operator releases'the brake on the carna e-0 era-tin drum and a J )lies )OWGI' and y a g causes tl'ie-cz'irriage to move to a point upward] y along the track at practically the same-rate of'speed as thebucket. He then disconnects both the-dipper and the carnage from the power and applies the friction* brakes to both drums after which he applies the power to the rotatlng mechanism 5 and rotates the carrier-frame to swing the dipmixture of the different strata or ingredients of which-thebank is composed. The cut made is continuous from the track level forwardly and outwardly in an arc concentric with the pivot of the dipper arm and then upwardly in a line parallel with the track and as this track' is adjustable within a limited extent the vertical angle of the face presented by the cut may be correspondingly adjusted, theiback-stay 16 constantly resisting the backward thrust of the dipper during operation and consequently by a suecession of single cuts as described made at difierent points in the bank within reach of the dipper through the rotation of the frame on its carriage a continuous cutting of any deslred length and height Within the limits of the vertical track having a. substantially level floor for carrying the tracks upon which the machine moves can be made into the bank.

'VVhat I claim is as follows '1. In a digging machine, a truck, a carrier frame rotatably mounted thereon consisting of a platform, a pair of vertical posts 1ocated in the opposite sides of said platform,- a pair of rigid diagonal lmck-stays having their opposite ends secured respectively to the platform and to the upper endsof the posts, a lateral extension on said platform consistingoi. pair of center sills, a substantiall vertical track the lower end of which is moan d on the free ends of said sills and a diagonal back-stay having. one end seemed to said carrier frame and constituting an extension of said first-mentioned back-stays and having its opposite end secured to the upper end of the track and adapted to constitute a rigid connection between the latter and the carrier frame.

2. In a digging machine, a carriage having a-pair of projecting plates, an arm one end of which is pivoted between said plates, a dipp'er mounted upon the free end ofsaid arm, a strut mounted upon the pivoted endof said arm and straddling the-same, said strut conslsting of a palr of channel-lron legs having a transverse channel-iron mountcd upon the free ends thereof, a tie-bar having its opposite ends secured respectively to the free ends of-the strut and said arm. and adapted to brace the strut, a powerdrivcn member and a rope operatively connecting the dipper to the power-drivenmemher and adapted to bear upon the strut.

In testimony whereof I have signed my name to this specification in the presence of two witnesses.

WILLIAM L. SCOTT. Witnesses:

WILLIAM J. C. Hnwn'rsoiw, GORDON Cr. 000m). 

